Yes Cookie the LevelUp will lift the whole coach up but you can not raise just one side or just one jack independently. Also the LevelUp used hydraulic fluids which could spring a leak, locking up the whole system. The electric wireless system can work independent of each other or all together. Also, if there is a problem with one jack, its easy to take a motor off of another leg and put it on the problem leg, never leaving a coach without being able to raise or lower any of the legs. An individual who is mechanically incline can also install the system themselves. There are a couple of folks on the forum who have done this.
If I remember correctly, the Sundance coaches do not have a hydraulic system, therefore making it more difficult to add the LevelUp system but its been 6 years since we owed a Sundance.